%%%------------------------------------------------------------------------------------------------------------
\begin{tikzpicture}
\scriptsize{
\begin{axis}[
width=12cm,
height=5cm,
yticklabel style={/pgf/number format/.cd,fixed,precision=2},
xticklabel style={color=white},,
xlabel={\footnotesize{搜索束大小（取$\log$）}},ylabel={\footnotesize{BLEU\;[\%]}},
ymin=28.8,ymax=30.4,
xmin=0,xmax=7,
xtick={0,1,2.32,3.32,4.91,6.64},
ytick={28.8,29.0,29.2,29.4,29.6,29.8,30.0,30.2,30.4},
xticklabels={0,1,2,3,4,5,6,7},
yticklabels={28.8,29.0,29.2,29.4,29.6,29.8,30.0,30.2,30.4},
legend style={yshift=-5em,xshift=0em,legend cell align=left,legend plot pos=right}
]

\addplot[purple,mark=square,mark=star,very thick] coordinates {(0,29.3) (1,29.7) (1.58,30.05) (2.32,30.1) (3,30.2) (3.32,30.3) (3.9,30.2) (4.32,30.08) (4.91,29.98) (5.91,29.6)(6.64,28.8) };
\end{axis}
\node[inner sep=0pt] at (0,-1em) {$\log$1};
\node[inner sep=0pt] at (1.5,-1em) {$\log$2};
%\node[inner sep=0pt] at (1.58,-1em) {$\log$3};
\node[inner sep=0pt] at (3.5,-1em) {$\log$5};
\node[inner sep=0pt] at (5.05,-1em) {$\log$10};
\node[inner sep=0pt] at (7.4,-1em) {$\log$30};
\node[inner sep=0pt] at (10.05,-1em) {$\log$100};

}
\end{tikzpicture}










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